Means for revolving fire-box doors.



A. E. VEZINA.

MEANS FOR REVOLVING FIRE BOX oooas.

APPLICATlON FILED OCT- 29,1915.

Patented Sept. 5, 1916.

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I A. E. VEZINA.

MEANS FOR REVOLVING FIRE BOX DGORS.

APPLICATION FILED OCT. 29, 1915.

1 ,1 97,41 1 Patented Sept. 5, 1916.

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INVENTOR ,H .E .Veg i. n a. WITNESSES {/9 Z 6 MM v a M M ,yrrorn c m:Nan-ms PETERS 0a., FHOTO-LIYNQ. WASNINGVQN, 0v 0 ANTOINE EMILE VEZINA,0F OUTREMONT, QUEBEC, CANADA.

MEANS FOR REVOLVING FIRE-BOX DOORS.

Specification of Letters Patent.

Patented Sept. a, rare.

Application filed October 29, 1915. Serial No. 58,691.

To all whom it may concern:

Be it known that I, ANTOINE EMILE Vii.- ZINA, a subject of the King ofGreat Britain, and resident in Outremont, in the Province of Quebec, inthe Dominion of Canada, have invented certain new and usefulImprovements in Means for Revolving Fire-Box Doors; and I do herebydeclare that the following'is a full, clear, and exact description ofthe same.

The invention relates to means for revolving fire boX doors of the kinddescribed in applicants Canadian Patent No. 152,7 68, and dated December23rd, 1913, and consists of a lever connected at one end to a quadrantwhich is in engagement with a pinion mounted on the actuating shaft ofthe doors, said lever being fulcrumed intermediate of its length and afoot pedal pivotally secured in the floor, disposed over the other endof said lever and means to actuate said lever so that by pressing thefoot pedal downwardly, it will cause the revolving doors to be openedand by releasing said foot pedal, the doors will be brought back intotheir closed position by means of a spring secured to one side of thequadrant, at one end, and to the boiler plate at the other end.

The object of the invention is to provide a means to actuate therevolving doors without causing any strain on the operator also wherebya certain amount of play will be given the said foot pedal forvibration, which usually happens on locomotives and whereby the doorswill be kept opened even if the operators foot did temporarily leave thepedal. The trouble with the ordinary foot pedals used for revolving firebox doors lies in the fact that vibration often causes the foot to slipofi, or lift from the pedal and immediately the doors close. Applicantspedal is so constructed that it would avoid also these inconveniences.

The invention will be hereinafter de scribed with the aid of theaccompanying drawings in which- Figure 1 is a side elevation of theinvention showing a portion of the door operating shaft and pedal, thesaid pedal being in its non-operative position. Fig. 2 is a sideelevation of the invention, the foot pedal being shown in its operativeposition. Fig. 3 is a top view of the foot pedal and Fig. 4 is an underview of the foot pedal.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 indicates the front plate of a locomotiveboiler and 2 represents the floor in which is secured the rectangularframe d which is secured to the said floor by means of the'projectingears 5 and bolts 6.

7 is a foot pedal pivotally mounted at one end on the shafts 8, whichare secured in the frame 4. Theotherend of said pedal being providedwith slots 9 and 10.

11 1s a shaft mounted in the sides of said pedal and journaled thereinand provided with a roller 12, said roller contacting with opellfnd ofthe lever 13, which is fulcrumed a 15 is a rod having a forked end 16 towhlch is pivotally connected the other end of the lever 13, said rodpassing through a slot in the floor 2 and being inclosed up to a certamheight by a casing 17, to prevent oinders, or coal from dropping beneaththe floor.

18 is a fork connection to which is threaded the rod 15 at one end and19 is a crank arm secured on the shaft 20 at one end and pivotallysecured at the other end between the forks 21 on connection 18.

22 is a quadrant rigidly mounted on the shaft 20 and 23 is a pinionengaging said quadrant.

24 is a spiral spring secured at one end to one side of the quadrant andat the other end to a hook 25 which is secured on a portion of theboiler. A number of hooks have been provided in order that if it isnecessary to give more tension to the said spring 24,

it may be attached to another hook disposed under said hook 25.

26 is an arm mounted on the shaft 11 within the foot pedal casing andhaving at one end the notch 27, which slightly projects through the slot9 and is adapted to engage the pawl 28 pivotally mounted on the lugs 29when the foot pedal is pressed clownwardly, the other end of said arm 26extending through the slot 10 and terminating in the expanded head 30.

It is readily seen that in the operation of the invention hereindescribed, the foot pedal 7 is pressed with the foot downwardly in theposition shown in Fig. 2. By pressing down said foot pedal 7 thefulcrumed lever 13 will be pressed downwardly by the roller 12 and thequadrant 22 will be actuated. Tn pressing down the foot pedal 7, thepawl 28 is adapted to engage the notch 27 in the end of the arm 26.Therefore, should the foot of the operator lift from contact with thepedal, due to vibration, therevolving doors will not close until the arm26 has followed its course to the position shown in dotted lines in Fig.2. The arm 26 having followed the above mentioned course, the pawl :28will disengage from the notch 27 and the foot pedal will immediatelycome into its inoperative position. It may here be stated that the sidesof the frame 4 are beveled in order that if any 'cinders, dust, or snowshould fall between the sides of the foot pedal 7 and the frame it willnot block, or clog-up.

It must be understood that the constructional details of the hereindescribed invention can be modified, if found desirable, so long as I donot depart from the invention as claimed in the following claims fornovelty.

What I claim is 1. Means for revolving fire box doors, comprising alever fulcrumed intermediate of its length, one end of said lever beingconnected to a quadrant which actuates the fire box doors, an openingprovided in the floor, a frame secured in said opening, a foot pedalpivotally secured in said frame, one end of said foot pedal forming acasing, a slot in the end of said casing, a slot through the top part ofsaid casing, a shaft within said casing and journaled in its sides, aroller mounted on said shaft and resting on the other end of said lever,an arm mounted on said shaft projecting through the slot provided in thetop of said casing and a notch provided at the other end of said arm, apawl secured in said frame, coacting with said notch and means to adjustthe movement of said fulcrumed lever substantially as described.

2. Means for revolving fire box doors, comprising a lever fulcrumedintermediate of its length, a quadrant actuating the fire box doors,said quadrant being mounted on a shaft, a crank arm rigidly mounted onsaid shaft and a rod connecting said crank arm to one end of said lever,an opening provided in the floor, a frame secured in said opening, afoot pedal pivotally secured in said frame, one end of said foot pedalforming a casing, a slot in the end of said casing, a slot through thetop part of said casing, a shaft within said casing and journaled in itssides, a roller mounted on said shaft and resting on the other end ofsaid lever, an arm mounted on said shaft projecting through the slotprovided in the top of said casing and a notch provided at the other endof said arm, a pawl secured in said frame, coacting with said notch andmeans to adjust the throw of said fulcrumed lever substantially asdescribed.

3. Means for revolving fire box doors, comprising a lever fulcrumedintermediate of its length, a quadrant actuating the fire box doors,said quadrant being mounted on a shaft, a crank arm rigidly mounted onsaid shaft, a rod pivotally connecting the crank arm to one end of saidlever, a spring secured at one end of said quadrant, and at the otherend to the face plate of the boiler, an opening provided in the floor, aframe secured in said opening, the inner sides of which are beveled, afoot pedal suitably pivoted in said frame, one end of said foot pedalbeing embossed and forming a casing, a slot in the end of said casing, aslot through the top of said casing, a shaft journaled in the lowermostsides of said casing, a roller mounted on said shaft resting on theother end of said lever, an arm pivotally mounted on said shaft, saidarm being curvedintermediate of its length and projecting' through theslot on top of saidcasing, a boss on the upper end of said arm in orderto stop its downward movement, a notch provided at the other end of saidarm, a pawl pivotally secured in lugs projecting from said frame andcoacting with, said notch and means to adjust the throw of saidfulcrumed lever substantially as described.

Signed at Montreal, Quebec, Canada, this 2nd. day of October, 1915.

- ANTOINE. EMILE VEZINA. Witnesses:

C. PATENAUDE, M. PATENAUDE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

